Mechanical door mat

Claim 1

A MECHANICALLY-OPERATED DOOR MAT FOR CLEANING SHOES COMPRISING, (A) A BASE, (B) A SUBSTANTIALLY HORIZONTAL GRILLE MEMBER SUPPORTED BY SAID BASE AND HAVING A PLURALITY OF LATERALLY SPACED WEIGHT-SUPPORTING BARS, (C) A FRAME DISPOSED BELOW SAID GRILLE MEMBER, A PLURALITY OF DOWNWARDLY EXTENDING ARMS PIVOTALLY MOUNTED AT THE LOWER ENDS THEREOF TO SAID BASE AND SLIDABLY ENGAGED AT THE UPPER ENDS THEREOF ON SAID FRAME, RESILIENT MEANS ASSOCIATED WITH SAID ARMS FOR RESILIENTLY SUPPORTING SAID FRAME ON SAID ARMS FOR DOWNWARD DISPLACEMENT UNDER PRESSURE, SAID ARMS MOUNTING SAID FRAME FOR RECIPROCAL MOVEMENT THROUGH AN ARC HAVING A RADIUS SPACED BENEATH SAID GRILLE MEMBER, (D) A PLURALITY OF BRUSH MEMBERS HAVING BRISTLES EXTENDING UPWARDLY BETWEEN SAID BARS, MEANS ON SAID FRAME FOR SUPPORTING SAID BRUSH MEMBERS, SAID BRISTLES TERMINATING IN UPPER ENDS WHICH NORMALLY EXTEND ABOVE THE UPPER SURFACE OF SAID GRILLE MEMBER AND MOVE WITH SAID FRAME, AND (E) DRIVING MEANS FOR RECIPROCATING SAID FRAME.